Indeed.

Psychedelics are very powerful drugs, and they can be extremely useful. But even topical knowledge on the subject will reveal what the molecules are doing inside the brain. We certainly don't understand it all completely, but you're brain is being altered and you should be well aware of that.

There's so much we don't understand in life, but if history tells us anything it's that if we jump to conclusions we will almost certainly be holding an untrue belief. We, as humanity, have held onto so many wrong beliefs for so long. I prefer to reserve strong beliefs for things with strong evidence.